WO2024081255A1 - Method of producing nanocellulose composition from solid or liquid cellulose-rich organic waste - Google Patents
Method of producing nanocellulose composition from solid or liquid cellulose-rich organic waste Download PDFInfo
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- WO2024081255A1 WO2024081255A1 PCT/US2023/034849 US2023034849W WO2024081255A1 WO 2024081255 A1 WO2024081255 A1 WO 2024081255A1 US 2023034849 W US2023034849 W US 2023034849W WO 2024081255 A1 WO2024081255 A1 WO 2024081255A1
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- WO
- WIPO (PCT)
- Prior art keywords
- feedstock
- nanocellulose composition
- generate
- nanocellulose
- prepared
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 197
- 229920001046 Nanocellulose Polymers 0.000 title claims abstract description 176
- 239000000203 mixture Substances 0.000 title claims abstract description 153
- 229920002678 cellulose Polymers 0.000 title claims abstract description 47
- 239000001913 cellulose Substances 0.000 title claims abstract description 47
- 239000007787 solid Substances 0.000 title claims abstract description 46
- 239000007788 liquid Substances 0.000 title claims abstract description 35
- 239000010815 organic waste Substances 0.000 title claims abstract description 28
- 238000006243 chemical reaction Methods 0.000 claims abstract description 104
- 238000005406 washing Methods 0.000 claims abstract description 11
- 238000012216 screening Methods 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000000126 substance Substances 0.000 claims description 17
- 239000000654 additive Substances 0.000 claims description 12
- 230000000996 additive effect Effects 0.000 claims description 12
- 238000000265 homogenisation Methods 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 10
- 238000005842 biochemical reaction Methods 0.000 claims description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000006227 byproduct Substances 0.000 claims description 9
- 230000007062 hydrolysis Effects 0.000 claims description 9
- 238000006460 hydrolysis reaction Methods 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 8
- 239000002699 waste material Substances 0.000 claims description 8
- 239000002351 wastewater Substances 0.000 claims description 8
- 102000004190 Enzymes Human genes 0.000 claims description 7
- 108090000790 Enzymes Proteins 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- 238000010894 electron beam technology Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 150000002500 ions Chemical class 0.000 claims description 6
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 6
- 229920000642 polymer Polymers 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 6
- 238000000527 sonication Methods 0.000 claims description 6
- 239000003921 oil Substances 0.000 claims description 5
- 239000010784 textile waste Substances 0.000 claims description 5
- 239000002154 agricultural waste Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 4
- 239000002440 industrial waste Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000002923 metal particle Substances 0.000 claims description 4
- 150000002739 metals Chemical class 0.000 claims description 4
- 238000004806 packaging method and process Methods 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims description 4
- 229920002994 synthetic fiber Polymers 0.000 claims description 4
- -1 trioxygen Chemical compound 0.000 claims description 4
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 3
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 claims description 3
- 241001465754 Metazoa Species 0.000 claims description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 3
- 229920002873 Polyethylenimine Polymers 0.000 claims description 3
- 150000007513 acids Chemical class 0.000 claims description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 3
- 235000013361 beverage Nutrition 0.000 claims description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 3
- 239000004327 boric acid Substances 0.000 claims description 3
- 150000001735 carboxylic acids Chemical class 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 238000000502 dialysis Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 239000000975 dye Substances 0.000 claims description 3
- 230000005496 eutectics Effects 0.000 claims description 3
- 239000003925 fat Substances 0.000 claims description 3
- 210000003608 fece Anatomy 0.000 claims description 3
- 235000019253 formic acid Nutrition 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 3
- 239000010842 industrial wastewater Substances 0.000 claims description 3
- 239000010871 livestock manure Substances 0.000 claims description 3
- GDOPTJXRTPNYNR-UHFFFAOYSA-N methyl-cyclopentane Natural products CC1CCCC1 GDOPTJXRTPNYNR-UHFFFAOYSA-N 0.000 claims description 3
- 239000010841 municipal wastewater Substances 0.000 claims description 3
- 229910017604 nitric acid Inorganic materials 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 238000001223 reverse osmosis Methods 0.000 claims description 3
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 claims description 3
- 229960002218 sodium chlorite Drugs 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 239000012209 synthetic fiber Substances 0.000 claims description 3
- 239000010918 textile wastewater Substances 0.000 claims description 3
- 210000002421 cell wall Anatomy 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 241000196324 Embryophyta Species 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000000123 paper Substances 0.000 description 7
- 235000019647 acidic taste Nutrition 0.000 description 6
- 229920003043 Cellulose fiber Polymers 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 229920002488 Hemicellulose Polymers 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 229920005610 lignin Polymers 0.000 description 3
- 210000001724 microfibril Anatomy 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 241000446313 Lamella Species 0.000 description 2
- 239000012620 biological material Substances 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 150000004676 glycans Chemical class 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 229920001282 polysaccharide Polymers 0.000 description 2
- 239000005017 polysaccharide Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 244000068988 Glycine max Species 0.000 description 1
- 235000010469 Glycine max Nutrition 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 239000010828 animal waste Substances 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 229920002988 biodegradable polymer Polymers 0.000 description 1
- 239000004621 biodegradable polymer Substances 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 229920001222 biopolymer Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010800 human waste Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 229920001277 pectin Polymers 0.000 description 1
- 239000001814 pectin Substances 0.000 description 1
- 235000010987 pectin Nutrition 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
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- 239000012763 reinforcing filler Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- 239000004753 textile Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C08H8/00—Macromolecular compounds derived from lignocellulosic materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B15/00—Preparation of other cellulose derivatives or modified cellulose, e.g. complexes
- C08B15/02—Oxycellulose; Hydrocellulose; Cellulosehydrate, e.g. microcrystalline cellulose
- C08B15/04—Carboxycellulose, e.g. prepared by oxidation with nitrogen dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
- C08L1/02—Cellulose; Modified cellulose
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
- C08L1/02—Cellulose; Modified cellulose
- C08L1/04—Oxycellulose; Hydrocellulose, e.g. microcrystalline cellulose
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01C—CHEMICAL OR BIOLOGICAL TREATMENT OF NATURAL FILAMENTARY OR FIBROUS MATERIAL TO OBTAIN FILAMENTS OR FIBRES FOR SPINNING; CARBONISING RAGS TO RECOVER ANIMAL FIBRES
- D01C1/00—Treatment of vegetable material
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/001—Modification of pulp properties
- D21C9/007—Modification of pulp properties by mechanical or physical means
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2301/02—Cellulose; Modified cellulose
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
Definitions
- the present disclosure relates generally to large-scale production of nanocellulose compositions, and more particularly to a method of producing a nanocellulose composition from solid or liquid cellulose-rich organic waste.
- Plant cell walls are complex structures comprised of diverse configurations of interlocking polysaccharides. Based on its structure and composition, a plant cell wall is divided into three different layers: the middle lamella, the primary cell wall, and the secondary cell wall.
- the middle lamella contains a high amount of lignin and is primarily responsible for binding the primary cell walls of adjoining plant cells.
- the primary cell wall is approximately 30-1000 nanometers (nm) thick and contains three main components: cellulose, hemicellulose, and pectin, where cellulose microfibrils are arranged crosswise.
- the secondary cell wall is further divided into three layers.
- cellulose is a well-organized fibrillar arrangement that is therefore primarily responsible for the mechanical strength of plants.
- Cellulose is considered to be one of the most abundant organic compounds derived from plant biomass. In this regard, most cellulose is produced naturally by plants, with total amounts exceeding 500 billion metric tons each year worldwide.
- Cellulose biopolymers are used in such industries which produce paper, insulation materials, textiles, composite materials, chemicals, etc.
- cellulose is a polysaccharide, its crystallinity is imperfect such that a significant portion of the cellulose structure is less active and can be referred to as amorphous.
- the degree of crystallinity of native cellulose usually ranges from 40% to 70% depending on the origin of the cellulose and the isolation method.
- the cellulose is present in the form of the microfibrils, which are bound together by lignin and hemicellulose. These microfibrils are very fine fibrils (i.e., fiber-like strands) having a width of 10-50 micrometers (pm).
- Cellulose is a natural stable polymer, containing a hydrogen bond network, which does not dissolve in common aqueous solvents and has a 60-270 °C / 500-518 °F / 533-543 K melting point.
- organic waste i.e., solid and liquid organic waste
- textile waste such as textile waste, agricultural waste, industrial waste, animal waste, and human waste
- organic waste typically contain a relatively high percentage of cellulose.
- many types of organic waste may be considered as “cellulose-rich'’.
- Nanocellulose discovered in 1980. is a relatively new material which is substantially different than cellulose.
- Nanocellulose is obtained by removing the amorphous parts (i.e., lignin and hemicellulose) from cellulose and downsizing the cellulose fibers such that only the active nano scale parts remain.
- nanocellulose is comprised of cellulose molecules with at least one dimension in nanoscale (1-100 nanometers (nm)) and with known properties of nanocellulose (e.g., zeta potential, strength, weight, etc.).
- the characteristic properties of nanocellulose including crystallinities, surface area, zeta potential, and mechanical properties, vary with the extraction methods and processing techniques which produce the nanocellulose. Such characteristic properties of nanocellulose typically depend on the technique and synthesis conditions of the nanocellulose, which determines its dimensions, composition, and properties.
- nanocellulose i.e., nanocellulose compositions
- production i.e., commercial or large-scale production
- nanocellulose i.e., nanocellulose compositions
- a relatively low quantity of nanocellulose is produced each year worldwide.
- there is currently an increased focus on cost-effective production of nanocellulose especially since research has increasingly shown nanocellulose to provide many advantages in industrial applications.
- nanocellulose is believed to be a replacement for synthetic materials due to having superior mechanical properties and being more environmentally-friendly.
- cellulose nanocomposites are being used in medical, space, building, automotive, electronics, packaging, construction, and wastewater treatment applications.
- Recent developments have shown the ability to increase the strength of sheets of paper with the addition of nanocellulose particles to paper compositions.
- such sheets of paper exhibit admirable mechanical properties. These mechanical properties of such sheets of paper are at least 2-5 times higher than those of conventional sheets of paper produced from conventional refining processes without the addition of nanocellulose particles.
- Nanocellulose can be used as a reinforcing filler to prepare composites with solutions of water-soluble polymers to modify the viscosity and increase mechanical properties of dry’ composites.
- biodegradable polymers which permits both the improvement of mechanical properties and speeds up the rate of biodegradation.
- Nanocellulose is a natural biodegradable material, highly suitable for the biomedical industry. Pure nanocellulose is nontoxic for people and it is biocompatible. Nanocellulose can be utilized for health care applications such as personal hygiene products, cosmetics, and biomedicines. Moreover, nanocellulose has electrical conductivity 7 and therefore has increased potential for use in electronics. Nanocellulose-based materials are carbon-neutral, nontoxic, sustainable, and recyclable. In this regard, considering at least what is discussed above, nanocellulose is a promising, futuristic new material with a wide range of industrial applications.
- the present disclosure aims to address the aforementioned need for large- scale, cost-effective, and environmentally-friendly production of nanocellulose compositions.
- at least one embodiment of the present disclosure provides a method of producing a nanocellulose composition from solid or liquid cellulose-rich organic waste. The method is advantageously capable of at least producing a nanocellulose composition in a manner which is large-scale, cost- effective, and environmentally-friendly.
- a method of producing a nanocellulose composition from solid or liquid cellulose-rich organic waste includes providing a feedstock comprising solid or liquid cellulose-rich organic waste, screening the feedstock to generate a screened feedstock, preparing the screened feedstock to generate a prepared feedstock, subjecting the prepared feedstock to a first reaction bath to generate an unrefined nanocellulose composition, washing the unrefined nanocellulose composition to generate a semirefined nanocellulose composition, and separating the semi-refined nanocellulose composition to generate a nanocellulose composition.
- the feedstock may comprise solid cellulose-rich organic waste selected from the group consisting of solid agncultural waste, solid industrial waste, solid textile waste, solid municipal waste, and solid forestry waste.
- the feedstock may comprise liquid cellulose-rich organic waste selected from the group consisting of agricultural wastewater, animal manure, industrial wastewater, textile wastewater, municipal wastewater, and beverage manufacturer wastewater.
- screening the feedstock to generate the screened feedstock may include characterizing the feedstock as solid or liquid, analyzing the feedstock, and removing unwanted matter from the feedstock.
- analyzing the feedstock may include determining at least one of the weight, density, chemical composition, water / moisture content (RH), acidity (pH), or electrical conductivity (EC) of the feedstock.
- removing the unwanted matter from the feedstock may include removing at least one of metal particles, plastic particles, synthetic fibers, glass particles, dust particles, sand particles, soil particles, construction aggregate particles, dead skin particles, ions, hair particles, fats, oils, or dyes from the feedstock.
- preparing the screened feedstock to generate the prepared feedstock may include subjecting the screened feedstock to a physical pretreatment process to downsize the screened feedstock and generate the prepared feedstock.
- subjecting the screened feedstock to the physical pretreatment process to downsize the screened feedstock may include subjecting the screened feedstock to at least one of a grinding process, a cutting process, a high-pressure homogenization process, a shear homogenization process, an electron beam process, a radiation process, a cavitation process, a sonication process, a vibration process, or a crushing process.
- preparing the screened feedstock to generate the prepared feedstock may further include analyzing the prepared feedstock after the screened feedstock has been downsized, and wherein analyzing the prepared feedstock may include determining at least one of the weight, volume, acidity (pH), temperature, viscosity, or electrical conductivity (EC) of the prepared feedstock.
- analyzing the prepared feedstock may include determining at least one of the weight, volume, acidity (pH), temperature, viscosity, or electrical conductivity (EC) of the prepared feedstock.
- subjecting the prepared feedstock to the first reaction bath to generate the unrefined nanocellulose composition may include conveying the prepared feedstock to the first reaction bath, subjecting the prepared feedstock to a physical reaction process of the first reaction bath, and subjecting the prepared feedstock to a chemical reaction process of the first reaction bath to generate the unrefined nanocellulose composition.
- conveying the prepared feedstock to the first reaction bath may include conveying the prepared feedstock to the first reaction bath by way of a conveyor netting, a pump, gravity, or air pressure.
- subjecting the prepared feedstock to the physical reaction process of the first reaction bath may include subjecting the prepared feedstock to at least one of a grinding process, a high-pressure homogenization process, a shear hydrolysis homogenization process, a hydrolysis process, a cavitation process, an electron beam process, a radiation process, a sonication process, a vibration process, a heating process, or a crushing process of the first reaction bath.
- subjecting the prepared feedstock to the chemical reaction process of the first reaction bath may include adding and mixing at least one selected from the group consisting of boric acid, formic acid, phosphoric acid, sodium hydroxide, hydrogen peroxide, trioxygen, citric acid, acetic acid, hydrobromide, hydrochloric acid, nitric acid, liquid ions, eutectic solvents, sodium chlorite, ethanol, carboxylic acid, phosphoric based acid, sulfuric based acids, TEMPO, polyethylene amine, deionized water, water, and any combination thereof, with the prepared feedstock.
- boric acid formic acid, phosphoric acid, sodium hydroxide, hydrogen peroxide, trioxygen, citric acid, acetic acid, hydrobromide, hydrochloric acid, nitric acid, liquid ions, eutectic solvents, sodium chlorite, ethanol, carboxylic acid, phosphoric based acid, sulfuric based acids, TEMPO, polyethylene amine, deion
- subjecting the prepared feedstock to the first reaction bath to generate the unrefined nanocellulose composition may further include subj ecting the prepared feedstock to a biochemical reaction process of the first reaction bath to generate the unrefined nanocellulose composition.
- subjecting the prepared feedstock to the biochemical reaction process of the first reaction bath may include adding and mixing hydrolysis enzymes with the prepared feedstock.
- the method may further include optionally subjecting the prepared feedstock to one or more additional reaction baths, after the first reaction bath, to generate the unrefined nanocellulose composition.
- washing the unrefined nanocellulose composition to generate the semi-refined nanocellulose composition may include washing the unrefined nanocellulose composition by way of a water immersion process, a water spray process, a dialysis process, a reverse osmosis process, or an acid removal process to thereby wash chemicals and/or unwanted reaction bath byproduct from the unrefined nanocellulose composition and generate the semi-refined nanocellulose composition.
- separating the semi-refined nanocellulose composition to generate the nanocellulose composition may include separating the semi-refined nanocellulose composition from remaining unwanted reaction bath byproduct to generate the nanocellulose composition.
- the nanocellulose composition may be undehydrated and in the form of a gel.
- the method may further include separating the nanocellulose composition to exit a system at different exit points, wherein the separating of the nanocellulose composition may be based on particle size and/or quality of the nanocellulose composition.
- the method may further include optionally dehydrating the nanocellulose composition.
- the nanocellulose composition that has been optionally dehydrated may be in the form of a powder.
- the method may further include finalizing the nanocellulose composition, wherein finalizing the nanocellulose composition may include adding and mixing at least one of additive polymers, additive chemicals, or additive metals with the nanocellulose composition to finalize the nanocellulose composition.
- the nanocellulose composition may be in the form of a powder or a gel after the nanocellulose composition has been finalized.
- the method may further include packaging the nanocellulose composition after the nanocellulose composition has been finalized.
- FIGS. 1-7 are flowcharts schematically illustrating a method of producing a nanocellulose composition from solid or liquid cellulose-rich organic waste, according to at least one embodiment.
- At least one embodiment of the present disclosure provides a method 100 of producing a nanocellulose composition from solid or liquid cellulose-rich organic waste.
- the method 100 is advantageously capable of at least producing a nanocellulose composition in a manner which is large-scale, cost-effective, and environmentally-friendly.
- the method 100 may be carried out in any desired or appropriate production environment (e.g., relatively large or small production facilities) and by using any production system, machine, equipment, etc. as desired or deemed appropriate.
- step S101 of the method 100 includes providing a feedstock (e.g., raw material) comprising solid or liquid cellulose-rich organic waste (e.g., recycled or virgin solid or liquid cellulose-rich organic waste).
- a feedstock e.g., raw material
- solid or liquid cellulose-rich organic waste e.g., recycled or virgin solid or liquid cellulose-rich organic waste
- organic waste that is referred to as “cellulose- rich” preferably contains at least 15 wt. % cellulose. It is to be appreciated, however, that various solid or liquid organic waste advantageously contains substantially greater amounts of cellulose (i.e., substantially greater than 15 wt. % cellulose), which is ideal for efficiently producing a greater amount of nanocellulose composition while carrying out the method 100.
- various agricultural waste e.g., various crops, etc.
- various forestry waste e.g., wood, bark, etc.
- various textile waste e.g., cotton, etc.
- the feedstock may comprise solid cellulose-rich organic waste selected from the group consisting of solid agricultural waste (e.g., crops such as com, wheat, soybeans, etc.), solid industrial waste, solid textile waste (e.g., cotton, etc.), solid municipal waste (e.g., solid human sewage, garbage, etc.), and solid forestry waste (e.g., wood, bark, etc.).
- solid agricultural waste e.g., crops such as com, wheat, soybeans, etc.
- solid industrial waste e.g., cotton, etc.
- solid municipal waste e.g., solid human sewage, garbage, etc.
- solid forestry waste e.g., wood, bark, etc.
- the feedstock may comprise liquid cellulose-rich organic waste selected from the group consisting of agricultural wastewater, animal manure, industrial wastewater (e.g., pulp or paper wastewater, etc.), textile wastewater, municipal wastewater (e.g., liquid human sewage, etc.), and beverage manufacturer wastewater.
- the feedstock may comprise any other type of solid or liquid cellulose-rich organic waste, and such solid or liquid cellulose-rich organic waste is not limited to the aforementioned non-limiting examples. Additionally, it is to be appreciated that such aforementioned solid or liquid cellulose-rich organic waste is typically readily available, abundant, and inexpensive.
- step SI 02 of the method 100 includes screening the feedstock to generate a screened feedstock.
- the step SI 02 of screening the feedstock to generate the screened feedstock may include characterizing the feedstock as solid or liquid, analyzing the feedstock, and removing unwanted matter from the feedstock.
- the feedstock may be characterized as solid or liquid.
- the feedstock may be analyzed.
- analyzing the feedstock may include determining at least one of the weight, density, chemical composition, water / moisture content (RH), acidity (pH), or electrical conductivity (EC) of the feedstock.
- RH water / moisture content
- EC electrical conductivity
- analyzed qualities and quantities of the feedstock may be determined or measured by scales, moisture analyzers, Spectro methods, or by using optics methods.
- removing the unwanted matter from the feedstock may include removing at least one of metal particles, plastic particles, synthetic fibers, glass particles, dust particles, sand particles, soil particles, construction aggregate particles, dead skin particles, ions, hair particles, fats, oils, or dyes from the feedstock.
- Other unwanted matter may be removed from the feedstock, and is not limited to the aforementioned non-limiting examples.
- the various unwanted matter may be removed from the feedstock by way of various equipment, processes, or techniques.
- a magnet is preferably used.
- gravity 7 a centrifuge, or precipitation could be used to remove unwanted matter such as sand particles or particles that are relatively heavy.
- soil particles and heavy particles may be removed by cyclones.
- oils may be removed by oil separators, and density separation, size separation by vibrating, or other screening may also be used to remove the unwanted matter.
- the unwanted matter removed from the feedstock may be further recycled so as to be environmentally -friendly.
- step SI 03 of the method 100 includes preparing the screened feedstock to generate a prepared feedstock.
- the step SI 03 of preparing the screened feedstock to generate the prepared feedstock may include subjecting the screened feedstock to a physical pretreatment process to downsize the screened feedstock and generate the prepared feedstock.
- the step SI 03 of preparing the screened feedstock to generate the prepared feedstock may further include analyzing the prepared feedstock after the screened feedstock has been downsized so as to generate the prepared feedstock.
- subjecting the screened feedstock to the physical pretreatment process to downsize the screened feedstock may include subjecting the screened feedstock to at least one of a grinding process, a cutting process, a high-pressure homogenization process, a shear homogenization process, an electron beam process, a radiation process, a cavitation process, a sonication process, a vibration process, or a crushing process.
- Other physical pretreatment processes may be used to downsize the screened feedstock, and are not limited to the aforementioned non-limiting examples.
- the particular physical pretreatment process may depend on such factors as whether the screened feedstock is solid or liquid, screened feedstock water content, screened feedstock chemical composition, bio solids in wastewater concentration of the screened feedstock, etc. Downsizing the screened feedstock (i. e.. into smaller physical particles) by way of the physical pretreatment process advantageously allows the screened feedstock to be treated and processed more efficiently in subsequent steps of the method 100 that will be further described herein. With further regard to step SI 03 of the method 100, once the screened feedstock has been downsized by way of the physical pretreatment process so as to generate the prepared feedstock, as further shown in FIG.
- the prepared feedstock may be analyzed to verify the prepared feedstock is ready to proceed to the subsequent step SI 04 of the method 100, which will be described later herein.
- analyzing the prepared feedstock may include determining at least one of the weight, volume, aci dity (pH), temperature, viscosity, or electrical conductivity (EC) of the prepared feedstock.
- Other qualities, quantities, reaction parameters, etc. of the prepared feedstock may be analyzed, and are not limited to the aforementioned non-limiting examples.
- such analyzed qualities, quantities, reaction parameters, etc. of the prepared feedstock may be measured by scales, moisture analyzers, Spectro methods, or by using optics methods.
- step SI 04 of the method 100 includes subjecting the prepared feedstock to a first reaction bath to generate an unrefined nanocellulose composition.
- the first reaction bath, and any subsequent reaction baths i.e., step S105
- step S105 is capable of physically and chemically altering the prepared feedstock so as to physically and chemically break down (i.e., downsize) the cellulose fibers of the prepared feedstock (i.e., to a nano-sized scale), thereby generating the unrefined nanocellulose composition.
- step S105 is capable of physically and chemically altering the prepared feedstock so as to physically and chemically break down (i.e., downsize) the cellulose fibers of the prepared feedstock (i.e., to a nano-sized scale), thereby generating the unrefined nanocellulose composition.
- the step SI 04 of subjecting the prepared feedstock to the first reaction bath to generate the unrefined nanocellulose composition may include conveying the prepared feedstock to the first reaction bath, subjecting the prepared feedstock to a physical reaction process of the first reaction bath, and subjecting the prepared feedstock to a chemical reaction process of the first reaction bath to generate the unrefined nanocellulose composition.
- the step S 104 of subjecting the prepared feedstock to the first reaction bath to generate the unrefined nanocellulose composition may include subjecting the prepared feedstock to a biochemical reaction process of the first reaction bath to generate the unrefined nanocellulose composition.
- conveying the prepared feedstock to the first reaction bath may include conveying the prepared feedstock to the first reaction bath by way of a conveyor netting, a pump, gravity, or air pressure.
- Other conveying apparatus or techniques may be used to convey the prepared feedstock to the first reaction bath and are not limited to the aforementioned non-limiting examples.
- step S 104 of the method 100 as shown in FIG. 4, once the prepared feedstock has been conveyed to the first reaction bath, the prepared feedstock may be subjected to the physical reaction process of the first reaction bath, the chemical reaction process of the first reaction bath, and/or the biochemical reaction process of the first reaction bath.
- subjecting the prepared feedstock to the physical reaction process of the first reaction bath may include subjecting the prepared feedstock to at least one of a grinding process, a high-pressure homogenization process, a shear hydrolysis homogenization process, a hydrolysis process, a cavitation process, an electron beam process, a radiation process, a sonication process, a vibration process, a heating process, or a crushing process of the first reaction bath.
- Other physical reaction processes may be used to carry out the first reaction bath, and are not limited to the aforementioned non-limiting examples.
- the physical reaction process of the first reaction bath may refine, separate, and break down (i.e., downsize) the cellulose fibers of the prepared feedstock.
- subjecting the prepared feedstock to the chemical reaction process of the first reaction bath may include adding and mixing at least one selected from the group consisting of boric acid, formic acid, phosphoric acid, sodium hydroxide, hydrogen peroxide, trioxygen, citnc acid, acetic acid, hydrobromide, hydrochloric acid, nitric acid, liquid ions, eutectic solvents, sodium chlorite, ethanol, carboxylic acid, phosphoric based acid, sulfuric based acids, TEMPO, polyethylene amine, deionized water, water, and any combination thereof, with the prepared feedstock.
- subjecting the prepared feedstock to the biochemical reaction process of the first reaction bath may include adding and mixing hydrolysis enzymes with the prepared feedstock.
- the particular chemicals, enzymes, etc. to be added and mixed with the prepared feedstock to carry out the chemical reaction process and/or the biochemical reaction process of the first reaction bath may depend on factors such as whether the prepared feedstock is solid or liquid, acidity (pH), electrical conductivity (EC), temperature, water content, viscosity, etc.
- acidity pH
- EC electrical conductivity
- temperature water content
- viscosity e.g., temperature, water content, viscosity, etc.
- such chemicals, enzymes, etc. described above may be used to carry out the chemical reaction process and/or the biochemical reaction process of the first reaction bath, however, other chemicals, enzymes, etc.
- the first reaction bath may also contain drainage for any liquids, and may sensor to monitor the acidity (pH), temperature, and electrical conductivity' (EC), as well as the particle size of the generated unrefined nanocellulose composition.
- the physical and chemical reaction processes of the first reaction bath may range from 1 second to 1 day, a reaction temperature of the first reaction bath may range from 1 to 400 °F, and the reaction pressure of the first reaction bath may range between -5 and 5 atm.
- step SI 05 of the method 100 includes optionally subjecting the prepared feedstock to one or more additional reaction baths, after the first reaction bath, to generate the unrefined nanocellulose composition.
- optional additional reaction baths i.e., similar or varied
- the first reaction bath may be carried out (e.g., up to 50 or more additional reaction baths) to further physically and chemically break down (i.e., downsize) the cellulose fibers of the prepared feedstock (i.e., to a nano-sized scale), thereby generating the unrefined nanocellulose composition.
- the liquid may be replaced, and various chemicals, enzymes, etc. may be added to the particular reaction bath to result in each reaction bath having a particular downsizing effect on the cellulose fibers of the prepared feedstock.
- any number of additional reaction baths may be carried out until the desired unrefined nanocellulose composition is generated.
- step S106 of the method 100 includes washing the unrefined nanocellulose composition to generate a semi-refined nanocellulose composition.
- washing the unrefined nanocellulose composition to generate the semi-refined nanocellulose composition may include washing the unrefined nanocellulose composition by way of a water immersion process, a water spray process, a dialysis process, a reverse osmosis process, or an acid removal process to thereby wash chemicals and/or unwanted reaction bath byproduct (i.e., further ending any ongoing reactions) from the unrefined nanocellulose composition and generate the semirefined nanocellulose composition.
- Other washing processes or techniques may be used to wash the chemicals and/or unwanted reaction bath byproduct from the unrefined nanocellulose composition and are not limited to the aforementioned non-limiting examples.
- step SI 07 of the method 100 includes separating the semi-refined nanocellulose composition to generate a nanocellulose composition. More specifically, with further regard to step SI 07 of the method 100, according to at least one embodiment, separating the semi -refined nanocellulose composition to generate the nanocellulose composition may include separating the semi-refined nanocellulose composition from remaining unwanted reaction bath byproduct (e.g., that still remains from step S106) to generate the nanocellulose composition.
- the semi-refined nanocellulose composition may be separated from the remaining unwanted reaction bath byproduct by way of various separation equipment or techniques, as may be understood by those skilled in the art. Moreover, according to at least one embodiment, the nanocellulose composition may be undehydrated and in the form of a gel after the semi-refined nanocellulose composition is separated from the remaining unwanted reaction bath byproduct to generate the nanocellulose composition.
- step SI 08 of the method 100 includes separating the nanocellulose composition to exit a system (e.g., the particular system or machine at which the method 100 is carried out) at different exit points (i.e., places or areas). More specifically, with further regard to step SI 08 of the method 100, the separating of the nanocellulose composition to exit the system at different exit points may be based on particle size and/or quality (e.g., zeta potential) of the nanocellulose composition. In this regard, as non-limiting examples, various size separation techniques, electro spin, or other spin technologies may be used to separate the nanocellulose composition to exit the system at the different exit points.
- particle size and/or quality e.g., zeta potential
- step SI 09 of the method 100 includes optionally dehydrating the nanocellulose composition to remove any water or moisture from the nanocellulose composition and further physically stabilize the nanocellulose composition.
- the nanocellulose composition that is optionally dehydrated is initially in gel form, then may be in powder form after being dehydrated.
- the nanocellulose composition that has been optionally dehydrated may be in the form of a powder.
- step SI 10 of the method 100 includes finalizing the nanocellulose composition.
- finalizing the nanocellulose composition may include adding and mixing at least one of additive polymers, additive chemicals, or additive metals with the nanocellulose composition to finalize the nanocellulose composition. Adding such additive polymers, additive chemicals, additive metals, etc. to the nanocellulose composition may advantageously customize the nanocellulose composition for specific uses and applications in various industries.
- the nanocellulose composition may be in the form of a powder or a gel after the nanocellulose composition has been finalized (i.e., depending on whether the nanocellulose composition has been optionally dehydrated in step S I 09 of the method 100).
- step Si l l of the method 100 includes packaging the nanocellulose composition after the nanocellulose composition has been finalized. More specifically, as non-limiting examples, the nanocellulose composition that has been finalized (i.e., finalized nanocellulose composition) may be packaged in boxes, containers, etc. in gel, powder, or other forms. Once packaged, the finalized nanocellulose composition is ready to be sent to customers, clients, etc.
- the nanocellulose composition that has been finalized i.e., finalized nanocellulose composition
- the nanocellulose composition that has been finalized may be packaged in boxes, containers, etc. in gel, powder, or other forms. Once packaged, the finalized nanocellulose composition is ready to be sent to customers, clients, etc.
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Abstract
A method of producing a nanocellulose composition from solid or liquid cellulose-rich organic waste includes providing a feedstock comprising solid or liquid cellulose-rich organic waste, screening the feedstock to generate a screened feedstock, preparing the screened feedstock to generate a prepared feedstock, subjecting the prepared feedstock to a first reaction bath to generate an unrefined nanocellulose composition, washing the unrefined nanocellulose composition to generate a semi-refined nanocellulose composition, and separating the semi- refined nanocellulose composition to generate a nanocellulose composition.
Description
TITLE
METHOD OF PRODUCING NANOCELLULOSE COMPOSITION FROM SOLID OR LIQUID CELLULOSE-RICH ORGANIC WASTE
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] The present application claims the benefit of priority to U.S. Provisional Patent Application Ser. No. 63/378,912, filed on October 10, 2022, the disclosure of which is hereby incorporated by reference in its entirety for all purposes.
TECHNICAL FIELD
[0002] The present disclosure relates generally to large-scale production of nanocellulose compositions, and more particularly to a method of producing a nanocellulose composition from solid or liquid cellulose-rich organic waste.
BACKGROUND
[0003] This section provides background information related to the present disclosure which is not necessarily prior art.
[0004] Plant cell walls are complex structures comprised of diverse configurations of interlocking polysaccharides. Based on its structure and composition, a plant cell wall is divided into three different layers: the middle lamella, the primary cell wall, and the secondary cell wall. The middle lamella contains a high amount of lignin and is primarily responsible for binding the primary cell walls of adjoining plant cells. The primary cell wall is approximately 30-1000 nanometers (nm) thick and contains three main components: cellulose, hemicellulose, and pectin, where cellulose microfibrils are arranged crosswise. The secondary cell wall is further divided into three layers.
[0005] With further regard to the above-described existence of cellulose in plant cell walls, cellulose is a well-organized fibrillar arrangement that is therefore primarily responsible for the mechanical strength of plants. Cellulose is considered to be one of the most abundant organic compounds derived from plant biomass. In this regard, most cellulose is produced naturally by plants, with total amounts exceeding 500 billion metric tons each year worldwide. Cellulose biopolymers are
used in such industries which produce paper, insulation materials, textiles, composite materials, chemicals, etc. Although cellulose is a polysaccharide, its crystallinity is imperfect such that a significant portion of the cellulose structure is less active and can be referred to as amorphous.
[0006] The degree of crystallinity of native cellulose usually ranges from 40% to 70% depending on the origin of the cellulose and the isolation method. The cellulose is present in the form of the microfibrils, which are bound together by lignin and hemicellulose. These microfibrils are very fine fibrils (i.e., fiber-like strands) having a width of 10-50 micrometers (pm). Cellulose is a natural stable polymer, containing a hydrogen bond network, which does not dissolve in common aqueous solvents and has a 60-270 °C / 500-518 °F / 533-543 K melting point.
[0007] Many types of organic waste (i.e., solid and liquid organic waste) such as textile waste, agricultural waste, industrial waste, animal waste, and human waste typically contain a relatively high percentage of cellulose. In this regard, many types of organic waste may be considered as “cellulose-rich'’.
[0008] Nanocellulose, discovered in 1980. is a relatively new material which is substantially different than cellulose. Nanocellulose is obtained by removing the amorphous parts (i.e., lignin and hemicellulose) from cellulose and downsizing the cellulose fibers such that only the active nano scale parts remain. In this regard, nanocellulose is comprised of cellulose molecules with at least one dimension in nanoscale (1-100 nanometers (nm)) and with known properties of nanocellulose (e.g., zeta potential, strength, weight, etc.). The characteristic properties of nanocellulose, including crystallinities, surface area, zeta potential, and mechanical properties, vary with the extraction methods and processing techniques which produce the nanocellulose. Such characteristic properties of nanocellulose typically depend on the technique and synthesis conditions of the nanocellulose, which determines its dimensions, composition, and properties.
[0009] Over the years, the production (i.e., commercial or large-scale production) of nanocellulose (i.e., nanocellulose compositions) has been limited and is
considered to be relatively expensive due to the costs of raw cellulosic materials, equipment, and production processes. Despite the potential of nanocellulose, a relatively low quantity of nanocellulose is produced each year worldwide. In this regard, there is currently an increased focus on cost-effective production of nanocellulose, especially since research has increasingly shown nanocellulose to provide many advantages in industrial applications. For example, nanocellulose is believed to be a replacement for synthetic materials due to having superior mechanical properties and being more environmentally-friendly. Moreover, in addition to nanocellulose being used to formulate completely new types of biomaterials, cellulose nanocomposites are being used in medical, space, building, automotive, electronics, packaging, construction, and wastewater treatment applications. Recent developments have shown the ability to increase the strength of sheets of paper with the addition of nanocellulose particles to paper compositions. In this regard, such sheets of paper exhibit admirable mechanical properties. These mechanical properties of such sheets of paper are at least 2-5 times higher than those of conventional sheets of paper produced from conventional refining processes without the addition of nanocellulose particles.
[0010] Moreover, in recent years within the composite industry, there has been a substantial growth in interest in the use of nanocellulose as a polymer reinforcement in order to create high-performance biomaterials. The core reason for the appeal of nanocellulose is that material with a higher uniformity and fewer defects with enhanced mechanical properties can be achieved by extracting the nanocellulose from cellulosic material. Nanocellulose can be used as a reinforcing filler to prepare composites with solutions of water-soluble polymers to modify the viscosity and increase mechanical properties of dry’ composites. Of utmost importance has been the addition of nanocellulose to biodegradable polymers, which permits both the improvement of mechanical properties and speeds up the rate of biodegradation. Nanocellulose is a natural biodegradable material, highly suitable for the biomedical industry. Pure nanocellulose is nontoxic for people and it is biocompatible. Nanocellulose can be utilized for health care applications such as personal hygiene products, cosmetics, and biomedicines. Moreover,
nanocellulose has electrical conductivity7 and therefore has increased potential for use in electronics. Nanocellulose-based materials are carbon-neutral, nontoxic, sustainable, and recyclable. In this regard, considering at least what is discussed above, nanocellulose is a promising, futuristic new material with a wide range of industrial applications.
[0011] Considering at least the above-mentioned advantages relating to the mechanical properties and industrial applications of nanocellulose, as well as the substantial grow th and increasing demand for nanocellulose, there is currently an unaddressed need for large-scale, cost-effective, and environmentally -friendly production of nanocellulose compositions.
SUMMARY
[0012] This section provides a general summary of the present disclosure and is not a comprehensive disclosure of its full scope or all of its features.
[0013] The present disclosure aims to address the aforementioned need for large- scale, cost-effective, and environmentally-friendly production of nanocellulose compositions. In this regard, at least one embodiment of the present disclosure provides a method of producing a nanocellulose composition from solid or liquid cellulose-rich organic waste. The method is advantageously capable of at least producing a nanocellulose composition in a manner which is large-scale, cost- effective, and environmentally-friendly.
[0014] According to at least one embodiment, a method of producing a nanocellulose composition from solid or liquid cellulose-rich organic waste includes providing a feedstock comprising solid or liquid cellulose-rich organic waste, screening the feedstock to generate a screened feedstock, preparing the screened feedstock to generate a prepared feedstock, subjecting the prepared feedstock to a first reaction bath to generate an unrefined nanocellulose composition, washing the unrefined nanocellulose composition to generate a semirefined nanocellulose composition, and separating the semi-refined nanocellulose composition to generate a nanocellulose composition.
[0015] According to at least one embodiment, the feedstock may comprise solid cellulose-rich organic waste selected from the group consisting of solid agncultural waste, solid industrial waste, solid textile waste, solid municipal waste, and solid forestry waste.
[0016] According to at least one embodiment, the feedstock may comprise liquid cellulose-rich organic waste selected from the group consisting of agricultural wastewater, animal manure, industrial wastewater, textile wastewater, municipal wastewater, and beverage manufacturer wastewater.
[0017] According to at least one embodiment, screening the feedstock to generate the screened feedstock may include characterizing the feedstock as solid or liquid, analyzing the feedstock, and removing unwanted matter from the feedstock.
[0018] According to at least one embodiment, analyzing the feedstock may include determining at least one of the weight, density, chemical composition, water / moisture content (RH), acidity (pH), or electrical conductivity (EC) of the feedstock.
[0019] According to at least one embodiment, removing the unwanted matter from the feedstock may include removing at least one of metal particles, plastic particles, synthetic fibers, glass particles, dust particles, sand particles, soil particles, construction aggregate particles, dead skin particles, ions, hair particles, fats, oils, or dyes from the feedstock.
[0020] According to at least one embodiment, preparing the screened feedstock to generate the prepared feedstock may include subjecting the screened feedstock to a physical pretreatment process to downsize the screened feedstock and generate the prepared feedstock.
[0021] According to at least one embodiment, subjecting the screened feedstock to the physical pretreatment process to downsize the screened feedstock may include subjecting the screened feedstock to at least one of a grinding process, a cutting process, a high-pressure homogenization process, a shear homogenization
process, an electron beam process, a radiation process, a cavitation process, a sonication process, a vibration process, or a crushing process.
[0022] According to at least one embodiment, preparing the screened feedstock to generate the prepared feedstock may further include analyzing the prepared feedstock after the screened feedstock has been downsized, and wherein analyzing the prepared feedstock may include determining at least one of the weight, volume, acidity (pH), temperature, viscosity, or electrical conductivity (EC) of the prepared feedstock.
[0023] According to at least one embodiment, subjecting the prepared feedstock to the first reaction bath to generate the unrefined nanocellulose composition may include conveying the prepared feedstock to the first reaction bath, subjecting the prepared feedstock to a physical reaction process of the first reaction bath, and subjecting the prepared feedstock to a chemical reaction process of the first reaction bath to generate the unrefined nanocellulose composition.
[0024] According to at least one embodiment, conveying the prepared feedstock to the first reaction bath may include conveying the prepared feedstock to the first reaction bath by way of a conveyor netting, a pump, gravity, or air pressure.
[0025] According to at least one embodiment, subjecting the prepared feedstock to the physical reaction process of the first reaction bath may include subjecting the prepared feedstock to at least one of a grinding process, a high-pressure homogenization process, a shear hydrolysis homogenization process, a hydrolysis process, a cavitation process, an electron beam process, a radiation process, a sonication process, a vibration process, a heating process, or a crushing process of the first reaction bath.
[0026] According to at least one embodiment, subjecting the prepared feedstock to the chemical reaction process of the first reaction bath may include adding and mixing at least one selected from the group consisting of boric acid, formic acid, phosphoric acid, sodium hydroxide, hydrogen peroxide, trioxygen, citric acid, acetic acid, hydrobromide, hydrochloric acid, nitric acid, liquid ions, eutectic solvents, sodium chlorite, ethanol, carboxylic acid, phosphoric based acid, sulfuric
based acids, TEMPO, polyethylene amine, deionized water, water, and any combination thereof, with the prepared feedstock.
[0027] According to at least one embodiment, subjecting the prepared feedstock to the first reaction bath to generate the unrefined nanocellulose composition may further include subj ecting the prepared feedstock to a biochemical reaction process of the first reaction bath to generate the unrefined nanocellulose composition.
[0028] According to at least one embodiment, subjecting the prepared feedstock to the biochemical reaction process of the first reaction bath may include adding and mixing hydrolysis enzymes with the prepared feedstock.
[0029] According to at least one embodiment, the method may further include optionally subjecting the prepared feedstock to one or more additional reaction baths, after the first reaction bath, to generate the unrefined nanocellulose composition.
[0030] According to at least one embodiment, washing the unrefined nanocellulose composition to generate the semi-refined nanocellulose composition may include washing the unrefined nanocellulose composition by way of a water immersion process, a water spray process, a dialysis process, a reverse osmosis process, or an acid removal process to thereby wash chemicals and/or unwanted reaction bath byproduct from the unrefined nanocellulose composition and generate the semi-refined nanocellulose composition.
[0031] According to at least one embodiment, separating the semi-refined nanocellulose composition to generate the nanocellulose composition may include separating the semi-refined nanocellulose composition from remaining unwanted reaction bath byproduct to generate the nanocellulose composition.
[0032] According to at least one embodiment, the nanocellulose composition may be undehydrated and in the form of a gel.
[0033] According to at least one embodiment, the method may further include separating the nanocellulose composition to exit a system at different exit points,
wherein the separating of the nanocellulose composition may be based on particle size and/or quality of the nanocellulose composition.
[0034] According to at least one embodiment, the method may further include optionally dehydrating the nanocellulose composition.
[0035] According to at least one embodiment, the nanocellulose composition that has been optionally dehydrated may be in the form of a powder.
[0036] According to at least one embodiment, the method may further include finalizing the nanocellulose composition, wherein finalizing the nanocellulose composition may include adding and mixing at least one of additive polymers, additive chemicals, or additive metals with the nanocellulose composition to finalize the nanocellulose composition.
[0037] According to at least one embodiment, the nanocellulose composition may be in the form of a powder or a gel after the nanocellulose composition has been finalized.
[0038] According to at least one embodiment, the method may further include packaging the nanocellulose composition after the nanocellulose composition has been finalized.
BRIEF DESCRIPTION OF THE DRAWINGS
[0039] The present disclosure will become more fully understood from the detailed description and the accompanying drawings, wherein:
[0040] FIGS. 1-7 are flowcharts schematically illustrating a method of producing a nanocellulose composition from solid or liquid cellulose-rich organic waste, according to at least one embodiment.
DETAILED DESCRIPTION
[0041] As required, one or more detailed embodiments of the present disclosure are disclosed herein, however, it is to be understood that the disclosed one or more embodiments are merely illustrative of the present disclosure that may be embodied in various and alternative forms. Therefore, specific details disclosed
herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present disclosure.
[0042] Referring generally to FIGS. 1-7, as will be further described herein in greater detail, at least one embodiment of the present disclosure provides a method 100 of producing a nanocellulose composition from solid or liquid cellulose-rich organic waste. As will become evident to those skilled in the art, the method 100 is advantageously capable of at least producing a nanocellulose composition in a manner which is large-scale, cost-effective, and environmentally-friendly. Moreover, it is to be understood by those skilled in the art that the method 100 may be carried out in any desired or appropriate production environment (e.g., relatively large or small production facilities) and by using any production system, machine, equipment, etc. as desired or deemed appropriate.
[0043] Referring to FIG. 1 , the method 100 begins at step S 101 thereof. According to at least one embodiment, step S101 of the method 100 includes providing a feedstock (e.g., raw material) comprising solid or liquid cellulose-rich organic waste (e.g., recycled or virgin solid or liquid cellulose-rich organic waste). According to the present disclosure, organic waste that is referred to as “cellulose- rich” preferably contains at least 15 wt. % cellulose. It is to be appreciated, however, that various solid or liquid organic waste advantageously contains substantially greater amounts of cellulose (i.e., substantially greater than 15 wt. % cellulose), which is ideal for efficiently producing a greater amount of nanocellulose composition while carrying out the method 100. For example, various agricultural waste (e.g., various crops, etc.) may contain approximately 30-60 wt. % cellulose, various forestry waste (e.g., wood, bark, etc.) may contain 41-53 wt. % cellulose, and various textile waste (e.g., cotton, etc.) may contain 90- 99 wt. % cellulose.
[0044] With further regard to step S I 01 of the method 100, according to at least one embodiment, as non-limiting examples, the feedstock may comprise solid cellulose-rich organic waste selected from the group consisting of solid agricultural waste (e.g., crops such as com, wheat, soybeans, etc.), solid industrial waste, solid textile waste (e.g., cotton, etc.), solid municipal waste (e.g., solid
human sewage, garbage, etc.), and solid forestry waste (e.g., wood, bark, etc.). Alternatively, or in addition, according to at least one embodiment, as non-limiting examples, the feedstock may comprise liquid cellulose-rich organic waste selected from the group consisting of agricultural wastewater, animal manure, industrial wastewater (e.g., pulp or paper wastewater, etc.), textile wastewater, municipal wastewater (e.g., liquid human sewage, etc.), and beverage manufacturer wastewater. The feedstock may comprise any other type of solid or liquid cellulose-rich organic waste, and such solid or liquid cellulose-rich organic waste is not limited to the aforementioned non-limiting examples. Additionally, it is to be appreciated that such aforementioned solid or liquid cellulose-rich organic waste is typically readily available, abundant, and inexpensive.
[0045] Referring to FIG. 2, once the feedstock has been provided from step SI 01, the method 100 may proceed to step S 102 thereof. According to at least one embodiment, step SI 02 of the method 100 includes screening the feedstock to generate a screened feedstock. In this regard, according to at least one embodiment, the step SI 02 of screening the feedstock to generate the screened feedstock may include characterizing the feedstock as solid or liquid, analyzing the feedstock, and removing unwanted matter from the feedstock.
[0046] More specifically, with further regard to step SI 02 of the method 100, as shown in FIG. 2, the feedstock may be characterized as solid or liquid. With further regard to step SI 02 of the method 100, once the feedstock has been characterized such that the feedstock has been determined to be solid or liquid, as further shown in FIG. 2, the feedstock may be analyzed. According to at least one embodiment, as non-limiting examples, analyzing the feedstock may include determining at least one of the weight, density, chemical composition, water / moisture content (RH), acidity (pH), or electrical conductivity (EC) of the feedstock. Other qualities and quantities of the feedstock may be analyzed, and are not limited to the aforementioned non-limiting examples. Moreover, such analyzed qualities and quantities of the feedstock may be determined or measured by scales, moisture analyzers, Spectro methods, or by using optics methods. With further regard to step S 102 of the method 100, once the feedstock has been analyzed, as further
show n in FIG. 2, unwanted matter may be removed from the feedstock. According to at least one embodiment, as non-limiting examples, removing the unwanted matter from the feedstock may include removing at least one of metal particles, plastic particles, synthetic fibers, glass particles, dust particles, sand particles, soil particles, construction aggregate particles, dead skin particles, ions, hair particles, fats, oils, or dyes from the feedstock. Other unwanted matter may be removed from the feedstock, and is not limited to the aforementioned non-limiting examples. The various unwanted matter may be removed from the feedstock by way of various equipment, processes, or techniques. For example, to remove metal particles, a magnet is preferably used. Additionally, gravity7, a centrifuge, or precipitation could be used to remove unwanted matter such as sand particles or particles that are relatively heavy. Moreover, soil particles and heavy particles may be removed by cyclones. Further, oils may be removed by oil separators, and density separation, size separation by vibrating, or other screening may also be used to remove the unwanted matter. The unwanted matter removed from the feedstock may be further recycled so as to be environmentally -friendly.
[0047] Referring to FIG. 3, once the screened feedstock has been generated from step SI 02, the method 100 may proceed to step SI 03 thereof. According to at least one embodiment, step SI 03 of the method 100 includes preparing the screened feedstock to generate a prepared feedstock. In this regard, as shown in FIG. 3, according to at least one embodiment, the step SI 03 of preparing the screened feedstock to generate the prepared feedstock may include subjecting the screened feedstock to a physical pretreatment process to downsize the screened feedstock and generate the prepared feedstock. Moreover, as shown in FIG. 3, according to at least one embodiment, the step SI 03 of preparing the screened feedstock to generate the prepared feedstock may further include analyzing the prepared feedstock after the screened feedstock has been downsized so as to generate the prepared feedstock.
[0048] More specifically, with further regard to step SI 03 of the method 100, according to at least one embodiment, as non-limiting examples, subjecting the screened feedstock to the physical pretreatment process to downsize the screened
feedstock may include subjecting the screened feedstock to at least one of a grinding process, a cutting process, a high-pressure homogenization process, a shear homogenization process, an electron beam process, a radiation process, a cavitation process, a sonication process, a vibration process, or a crushing process. Other physical pretreatment processes may be used to downsize the screened feedstock, and are not limited to the aforementioned non-limiting examples. Moreover, the particular physical pretreatment process may depend on such factors as whether the screened feedstock is solid or liquid, screened feedstock water content, screened feedstock chemical composition, bio solids in wastewater concentration of the screened feedstock, etc. Downsizing the screened feedstock (i. e.. into smaller physical particles) by way of the physical pretreatment process advantageously allows the screened feedstock to be treated and processed more efficiently in subsequent steps of the method 100 that will be further described herein. With further regard to step SI 03 of the method 100, once the screened feedstock has been downsized by way of the physical pretreatment process so as to generate the prepared feedstock, as further shown in FIG. 3, the prepared feedstock may be analyzed to verify the prepared feedstock is ready to proceed to the subsequent step SI 04 of the method 100, which will be described later herein. According to at least one embodiment, as non-limiting examples, analyzing the prepared feedstock may include determining at least one of the weight, volume, aci dity (pH), temperature, viscosity, or electrical conductivity (EC) of the prepared feedstock. Other qualities, quantities, reaction parameters, etc. of the prepared feedstock may be analyzed, and are not limited to the aforementioned non-limiting examples. Moreover, such analyzed qualities, quantities, reaction parameters, etc. of the prepared feedstock may be measured by scales, moisture analyzers, Spectro methods, or by using optics methods.
[0049] Referring to FIG. 4, once the prepared feedstock has been generated from step SI 03, the method 100 may proceed to step SI 04 thereof. According to at least one embodiment, step SI 04 of the method 100 includes subjecting the prepared feedstock to a first reaction bath to generate an unrefined nanocellulose composition. In this regard, the first reaction bath, and any subsequent reaction
baths (i.e., step S105), is capable of physically and chemically altering the prepared feedstock so as to physically and chemically break down (i.e., downsize) the cellulose fibers of the prepared feedstock (i.e., to a nano-sized scale), thereby generating the unrefined nanocellulose composition. As shown in FIG. 4, according to at least one embodiment, the step SI 04 of subjecting the prepared feedstock to the first reaction bath to generate the unrefined nanocellulose composition may include conveying the prepared feedstock to the first reaction bath, subjecting the prepared feedstock to a physical reaction process of the first reaction bath, and subjecting the prepared feedstock to a chemical reaction process of the first reaction bath to generate the unrefined nanocellulose composition. Moreover, as show n in FIG. 4, according to at least one embodiment, the step S 104 of subjecting the prepared feedstock to the first reaction bath to generate the unrefined nanocellulose composition may include subjecting the prepared feedstock to a biochemical reaction process of the first reaction bath to generate the unrefined nanocellulose composition.
[0050] More specifically, with further regard to step SI 04 of the method 100, according to at least one embodiment, as non-limiting examples, conveying the prepared feedstock to the first reaction bath may include conveying the prepared feedstock to the first reaction bath by way of a conveyor netting, a pump, gravity, or air pressure. Other conveying apparatus or techniques may be used to convey the prepared feedstock to the first reaction bath and are not limited to the aforementioned non-limiting examples. With further regard to step S 104 of the method 100, as shown in FIG. 4, once the prepared feedstock has been conveyed to the first reaction bath, the prepared feedstock may be subjected to the physical reaction process of the first reaction bath, the chemical reaction process of the first reaction bath, and/or the biochemical reaction process of the first reaction bath. With further regard to step SI 04 of the method 100, according to at least one embodiment, as non-limiting examples, subjecting the prepared feedstock to the physical reaction process of the first reaction bath may include subjecting the prepared feedstock to at least one of a grinding process, a high-pressure homogenization process, a shear hydrolysis homogenization process, a hydrolysis
process, a cavitation process, an electron beam process, a radiation process, a sonication process, a vibration process, a heating process, or a crushing process of the first reaction bath. Other physical reaction processes may be used to carry out the first reaction bath, and are not limited to the aforementioned non-limiting examples. The physical reaction process of the first reaction bath may refine, separate, and break down (i.e., downsize) the cellulose fibers of the prepared feedstock. With further regard to step SI 04 of the method 100, according to at least one embodiment, as non-limiting examples, subjecting the prepared feedstock to the chemical reaction process of the first reaction bath may include adding and mixing at least one selected from the group consisting of boric acid, formic acid, phosphoric acid, sodium hydroxide, hydrogen peroxide, trioxygen, citnc acid, acetic acid, hydrobromide, hydrochloric acid, nitric acid, liquid ions, eutectic solvents, sodium chlorite, ethanol, carboxylic acid, phosphoric based acid, sulfuric based acids, TEMPO, polyethylene amine, deionized water, water, and any combination thereof, with the prepared feedstock. With further regard to step SI 04 of the method 100, according to at least one embodiment, as a non-limiting example, subjecting the prepared feedstock to the biochemical reaction process of the first reaction bath may include adding and mixing hydrolysis enzymes with the prepared feedstock. The particular chemicals, enzymes, etc. to be added and mixed with the prepared feedstock to carry out the chemical reaction process and/or the biochemical reaction process of the first reaction bath may depend on factors such as whether the prepared feedstock is solid or liquid, acidity (pH), electrical conductivity (EC), temperature, water content, viscosity, etc. As previously mentioned, such chemicals, enzymes, etc. described above may be used to carry out the chemical reaction process and/or the biochemical reaction process of the first reaction bath, however, other chemicals, enzymes, etc. not specifically mentioned may also be used to earn- out the chemical reaction process and/or the biochemical reaction process of the first reaction bath. With further regard to step SI 04 of the method 100, the first reaction bath may also contain drainage for any liquids, and may sensor to monitor the acidity (pH), temperature, and electrical conductivity' (EC), as well as the particle size of the generated unrefined nanocellulose composition. The physical and chemical reaction processes of the
first reaction bath may range from 1 second to 1 day, a reaction temperature of the first reaction bath may range from 1 to 400 °F, and the reaction pressure of the first reaction bath may range between -5 and 5 atm.
[0051] Still referring to FIG. 4, once the unrefined nanocellulose composition has been generated from step SI 04, the method 100 may proceed to step SI 05 thereof. According to at least one embodiment, step SI 05 of the method 100 includes optionally subjecting the prepared feedstock to one or more additional reaction baths, after the first reaction bath, to generate the unrefined nanocellulose composition. More specifically, with further regard to step SI 05 of the method 100, optional additional reaction baths (i.e., similar or varied) to the first reaction bath may be carried out (e.g., up to 50 or more additional reaction baths) to further physically and chemically break down (i.e., downsize) the cellulose fibers of the prepared feedstock (i.e., to a nano-sized scale), thereby generating the unrefined nanocellulose composition. In between each additional reaction bath, the liquid may be replaced, and various chemicals, enzymes, etc. may be added to the particular reaction bath to result in each reaction bath having a particular downsizing effect on the cellulose fibers of the prepared feedstock. In this regard, any number of additional reaction baths may be carried out until the desired unrefined nanocellulose composition is generated.
[0052] Referring to FIG. 5, once the unrefined nanocellulose composition has been generated from step S104 and/or step S105 (i.e., in the case where the prepared feedstock has been optionally subjected to one or more additional reaction baths to generate the unrefined nanocellulose composition), the method 100 may proceed to step SI 06 thereof. According to at least one embodiment, step S106 of the method 100 includes washing the unrefined nanocellulose composition to generate a semi-refined nanocellulose composition. More specifically, with further regard to step SI 06 of the method 100, according to at least one embodiment, as non-limiting examples, washing the unrefined nanocellulose composition to generate the semi-refined nanocellulose composition may include washing the unrefined nanocellulose composition by way of a water immersion process, a water spray process, a dialysis process, a
reverse osmosis process, or an acid removal process to thereby wash chemicals and/or unwanted reaction bath byproduct (i.e., further ending any ongoing reactions) from the unrefined nanocellulose composition and generate the semirefined nanocellulose composition. Other washing processes or techniques may be used to wash the chemicals and/or unwanted reaction bath byproduct from the unrefined nanocellulose composition and are not limited to the aforementioned non-limiting examples.
[0053] Referring to FIG. 6, once the semi-refined nanocellulose composition has been generated from step SI 06, the method 100 may proceed to step SI 07 thereof. According to at least one embodiment, step SI 07 of the method 100 includes separating the semi-refined nanocellulose composition to generate a nanocellulose composition. More specifically, with further regard to step SI 07 of the method 100, according to at least one embodiment, separating the semi -refined nanocellulose composition to generate the nanocellulose composition may include separating the semi-refined nanocellulose composition from remaining unwanted reaction bath byproduct (e.g., that still remains from step S106) to generate the nanocellulose composition. The semi-refined nanocellulose composition may be separated from the remaining unwanted reaction bath byproduct by way of various separation equipment or techniques, as may be understood by those skilled in the art. Moreover, according to at least one embodiment, the nanocellulose composition may be undehydrated and in the form of a gel after the semi-refined nanocellulose composition is separated from the remaining unwanted reaction bath byproduct to generate the nanocellulose composition.
[0054] Still referring to FIG. 6, once the nanocellulose composition has been generated from step S107, the method 100 may proceed to step SI 08 thereof. According to at least one embodiment, step SI 08 of the method 100 includes separating the nanocellulose composition to exit a system (e.g., the particular system or machine at which the method 100 is carried out) at different exit points (i.e., places or areas). More specifically, with further regard to step SI 08 of the method 100, the separating of the nanocellulose composition to exit the system at different exit points may be based on particle size and/or quality (e.g., zeta
potential) of the nanocellulose composition. In this regard, as non-limiting examples, various size separation techniques, electro spin, or other spin technologies may be used to separate the nanocellulose composition to exit the system at the different exit points.
[0055] Still referring to FIG. 6, once the nanocellulose composition has been separated to exit the system at different exit points from step SI 08, the method 100 may proceed to step SI 09 thereof. According to at least one embodiment, step SI 09 of the method 100 includes optionally dehydrating the nanocellulose composition to remove any water or moisture from the nanocellulose composition and further physically stabilize the nanocellulose composition. In this regard, the nanocellulose composition that is optionally dehydrated is initially in gel form, then may be in powder form after being dehydrated. As such, according to at least one embodiment, the nanocellulose composition that has been optionally dehydrated may be in the form of a powder.
[0056] Referring to FIG. 7, once the nanocellulose composition has been separated to exit the system at different exit points from step S 108, and/or has been optionally dehydrated from step SI 09, the method 100 may proceed to step SI 10 thereof. According to at least one embodiment, step SI 10 of the method 100 includes finalizing the nanocellulose composition. In at least one embodiment, as non-limiting examples, finalizing the nanocellulose composition may include adding and mixing at least one of additive polymers, additive chemicals, or additive metals with the nanocellulose composition to finalize the nanocellulose composition. Adding such additive polymers, additive chemicals, additive metals, etc. to the nanocellulose composition may advantageously customize the nanocellulose composition for specific uses and applications in various industries. Moreover, according to at least one embodiment, the nanocellulose composition may be in the form of a powder or a gel after the nanocellulose composition has been finalized (i.e., depending on whether the nanocellulose composition has been optionally dehydrated in step S I 09 of the method 100).
[0057] Still referring to FIG. 7, once the nanocellulose composition has been finalized from step SI 10, the method 100 may proceed to step Si l l thereof.
According to at least one embodiment, step Si l l of the method 100 includes packaging the nanocellulose composition after the nanocellulose composition has been finalized. More specifically, as non-limiting examples, the nanocellulose composition that has been finalized (i.e., finalized nanocellulose composition) may be packaged in boxes, containers, etc. in gel, powder, or other forms. Once packaged, the finalized nanocellulose composition is ready to be sent to customers, clients, etc.
[0058] While one or more embodiments are described above, it is not intended that the one or more embodiments describe all possible forms encompassed by the claims. The words used in the specification are words of description rather than limitation, and it is understood that various changes may be made without departing from the spirit and scope of the disclosure. The features of various embodiments may be combined to form further embodiments of the disclosure that may not be explicitly described or illustrated.
[0059] With regard to any methods, processes, etc., described herein, it should be understood that, although the steps of such methods, processes, etc. have been described as occurring according to a certain ordered sequence, such methods, processes, etc. could be practiced with the described steps performed in an order other than the order described herein. It should be further understood that certain steps could be performed simultaneously, that other steps could be added, or that certain steps described herein could be omitted. In other words, the descriptions of any methods, processes, etc. described above are provided for the purpose of illustrating certain embodiments, and should in no way be construed so as to limit the claims.
[0060] As used in this specification and claims, the terms "for example”/ (“e.g.”), "for instance”, "such as”, and "like”, and the verbs "comprising”, "having", "including", and their other verb forms, when used in conjunction with a listing of one or more carriers or other items, are each to be construed as open-ended, meaning that the listing is not to be considered as excluding other, additional carriers or items. Other terms are to be construed using their broadest reasonable meaning unless they are used in a context that requires a different interpretation.
Claims
1. A method of producing a nanocellulose composition from solid or liquid cellulose-rich organic waste, the method comprising: providing a feedstock comprising solid or liquid cellulose-rich organic waste; screening the feedstock to generate a screened feedstock; preparing the screened feedstock to generate a prepared feedstock; subjecting the prepared feedstock to a first reaction bath to generate an unrefined nanocellulose composition; washing the unrefined nanocellulose composition to generate a semirefined nanocellulose composition; and separating the semi-refined nanocellulose composition to generate a nanocellulose composition.
2. The method according to claim 1, wherein the feedstock comprises solid cellulose-rich organic waste selected from the group consisting of solid agricultural waste, solid industrial waste, solid textile waste, solid municipal waste, and solid forestry waste.
3. The method according to claim 1. wherein the feedstock comprises liquid cellulose-rich organic waste selected from the group consisting of agricultural wastewater, animal manure, industrial wastewater, textile wastewater, municipal wastewater, and beverage manufacturer wastewater.
4. The method according to claim 1, wherein screening the feedstock to generate the screened feedstock includes characterizing the feedstock as solid or liquid, analyzing the feedstock, and removing unwanted matter from the feedstock.
5. The method according to claim 4, wherein analyzing the feedstock includes determining at least one of the weight, density, chemical composition, water /
moisture content (RH), acidity7 (pH), or electrical conductivity7 (EC) of the feedstock.
6. The method according to claim 4, wherein removing the unwanted matter from the feedstock includes removing at least one of metal particles, plastic particles, synthetic fibers, glass particles, dust particles, sand particles, soil particles, construction aggregate particles, dead skin particles, ions, hair particles, fats, oils, or dyes from the feedstock.
7. The method according to claim 1, wherein preparing the screened feedstock to generate the prepared feedstock includes subjecting the screened feedstock to a physical pretreatment process to downsize the screened feedstock and generate the prepared feedstock.
8. The method according to claim 7, wherein subjecting the screened feedstock to the physical pretreatment process to downsize the screened feedstock includes subjecting the screened feedstock to at least one of a grinding process, a cutting process, a high-pressure homogenization process, a shear homogenization process, an electron beam process, a radiation process, a cavitation process, a sonication process, a vibration process, or a crushing process.
9. The method according to claim 7, wherein preparing the screened feedstock to generate the prepared feedstock further includes analyzing the prepared feedstock after the screened feedstock has been downsized, and wherein analyzing the prepared feedstock includes determining at least one of the weight, volume, acidity (pH), temperature, viscosity, or electrical conductivity (EC) of the prepared feedstock.
10. The method according to claim 1, wherein subjecting the prepared feedstock to the first reaction bath to generate the unrefined nanocellulose composition includes conveying the prepared feedstock to the first reaction bath, subjecting the prepared feedstock to a physical reaction process of the first reaction
bath, and subjecting the prepared feedstock to a chemical reaction process of the first reaction bath to generate the unrefined nanocellulose composition.
11. The method according to claim 10, wherein conveying the prepared feedstock to the first reaction bath includes conveying the prepared feedstock to the first reaction bath by way of a conveyor netting, a pump, gravity, or air pressure.
12. The method according to claim 10, wherein subjecting the prepared feedstock to the physical reaction process of the first reaction bath includes subjecting the prepared feedstock to at least one of a grinding process, a high- pressure homogenization process, a shear hydrolysis homogenization process, a hydrolysis process, a cavitation process, an electron beam process, a radiation process, a sonication process, a vibration process, a heating process, or a crushing process of the first reaction bath.
13. The method according to claim 10, wherein subjecting the prepared feedstock to the chemical reaction process of the first reaction bath includes adding and mixing at least one selected from the group consisting of boric acid, formic acid, phosphoric acid, sodium hydroxide, hydrogen peroxide, trioxygen, citric acid, acetic acid, hydrobromide, hydrochloric acid, nitric acid, liquid ions, eutectic solvents, sodium chlorite, ethanol, carboxylic acid, phosphoric based acid, sulfuric based acids, TEMPO, polyethylene amine, deionized water, water, and any combination thereof, with the prepared feedstock.
14. The method according to claim 10, wherein subjecting the prepared feedstock to the first reaction bath to generate the unrefined nanocellulose composition further includes subjecting the prepared feedstock to a biochemical reaction process of the first reaction bath to generate the unrefined nanocellulose composition.
15. The method according to claim 14, wherein subjecting the prepared feedstock to the biochemical reaction process of the first reaction bath includes adding and mixing hydrolysis enzymes with the prepared feedstock.
16. The method according to claim 1, further comprising optionally subjecting the prepared feedstock to one or more additional reaction baths, after the first reaction bath, to generate the unrefined nanocellulose composition.
17. The method according to claim 1, wherein washing the unrefined nanocellulose composition to generate the semi-refined nanocellulose composition includes washing the unrefined nanocellulose composition by way of a water immersion process, a water spray process, a dialysis process, a reverse osmosis process, or an acid removal process to thereby wash chemicals and/or unwanted reaction bath byproduct from the unrefined nanocellulose composition and generate the semi-refined nanocellulose composition.
18. The method according to claim 1 , wherein separating the semi-refined nanocellulose composition to generate the nanocellulose composition includes separating the semi-refined nanocellulose composition from remaining unwanted reaction bath byproduct to generate the nanocellulose composition.
19. The method according to claim 18, wherein the nanocellulose composition is undehydrated and is in the form of a gel.
20. The method according to claim 18. further comprising separating the nanocellulose composition to exit a system at different exit points, wherein the separating of the nanocellulose composition is based on particle size and/or quality of the nanocellulose composition.
21. The method according to claim 20, further comprising optionally dehydrating the nanocellulose composition.
22. The method according to claim 21 , wherein the nanocellulose composition that has been optionally dehydrated is in the form of a powder.
23. The method according to claim 20, further comprising finalizing the nanocellulose composition, wherein finalizing the nanocellulose composition includes adding and mixing at least one of additive polymers, additive chemicals, or additive metals with the nanocellulose composition to finalize the nanocellulose composition.
24. The method according to claim 23, wherein the nanocellulose composition is in the form of a powder or a gel after the nanocellulose composition has been finalized.
25. The method according to claim 23, further comprising packaging the nanocellulose composition after the nanocellulose composition has been finalized.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080306255A1 (en) * | 2005-01-31 | 2008-12-11 | National Institute Of Advanced Industrial Science | Method for Selective Separation of Cellulosic Polymer and Apparatus Therefor |
| CN109024039A (en) * | 2017-06-09 | 2018-12-18 | 天津科技大学 | A kind of preparation method of the nano-cellulose of type containing lignin gel |
| US20190301094A1 (en) * | 2016-11-23 | 2019-10-03 | Fibria Celulose S.A. | Process of producing fibrillated nanocellulose with low energy consumption |
| US20200262108A1 (en) * | 2017-09-08 | 2020-08-20 | The Hong Kong Research Institute Of Textiles And Apparel Limited | Method for separating and recycling a waste polyester-cotton textile by means of a hydrothermal reaction catalyzed by an organic acid |
| WO2020252523A1 (en) * | 2019-06-18 | 2020-12-24 | BlockTexx Labs Pty Ltd | A system and process for the separation and recycling of blended polyester and cotton textiles for re-use |
-
2023
- 2023-10-10 WO PCT/US2023/034849 patent/WO2024081255A1/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080306255A1 (en) * | 2005-01-31 | 2008-12-11 | National Institute Of Advanced Industrial Science | Method for Selective Separation of Cellulosic Polymer and Apparatus Therefor |
| US20190301094A1 (en) * | 2016-11-23 | 2019-10-03 | Fibria Celulose S.A. | Process of producing fibrillated nanocellulose with low energy consumption |
| CN109024039A (en) * | 2017-06-09 | 2018-12-18 | 天津科技大学 | A kind of preparation method of the nano-cellulose of type containing lignin gel |
| US20200262108A1 (en) * | 2017-09-08 | 2020-08-20 | The Hong Kong Research Institute Of Textiles And Apparel Limited | Method for separating and recycling a waste polyester-cotton textile by means of a hydrothermal reaction catalyzed by an organic acid |
| WO2020252523A1 (en) * | 2019-06-18 | 2020-12-24 | BlockTexx Labs Pty Ltd | A system and process for the separation and recycling of blended polyester and cotton textiles for re-use |
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